Miking machine



R. H. GERARD. 1mm@ MACHINE.

APPLICATION FIL MAY 25, |92!r Patented June 6, 192'?.

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MIXING MACHINE.

APPLICATION mio MAY 25. 12121` 1,418,641. PatenbedJune 6, 1922.

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MIXING MACHINE.

APPLICATION ULEB MAY 25. 1921.

Patend June 6, 192".

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PATENT OFFICE.

BUY H. GERARD, 0F DETROIT. MICHIGAN,

`ASSIGNOR TO MORGAN & WRIGHT, A CO3-,

PORATION 0F MICHGAN'.

MIXING- MACHINE.

Application flied May V525,

To all whom it may concern.'

Be it known that I, Roi;v H. GERARD, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and. useful mprovements in Mixing Machines. of which. the following is a full, clear, and exactdescription.

This invention relates to mixing machines in general and in particular to a type thereof Yfor compounding rubber and various ingredients into a batch suitable for sprea.d ing, calenderin tubing or other hke operations incidentalg to the manufacture of vu;l canized articles. The old practice was to prepare n batch on a mill consisting of con miei-ating;r rollers, powerfully driven, which squeezed and Worked the mass into a more or less homogeneous condition. An operator was're uired to attend the mill and the thoroug ness of mix depended in large measure upon his individualskill.

The present invention relates to a mechanical mixer requiring no attention after chargingwhich is much more rapid than the old mixing mill. Mechanical mixing niecliines of variousforms have been proposed heretofore and thisiinvention aims to pro vide new und improved features rendering the. machines more practical` for manufacturers.

Briefly, it consists in a tub or container in which rotate agitators and. about the axis of one of which agitators, the container or tub may be tilted for convenience in discharging a properly pre ered batch Without stoppin f` the rotation o the agitetors. A cornhinel cover and hopper is movably supported at the top of the container or tub for convenient charging of the materials und for convenient removal to a non-obstructing positicn when the container is tilted to discharge a prepared batch.

The invention is illustrated in the accom panying drawin s in whicl1:-

Fig. l is en e evation partly in section of a referred embodiment of the invention,

ig. *2 is a plan view of the same also partly` in section,

Specification of Letters Patent.

Patented June 6, 1922.

1921. serial Nn. rimase.

Fig. 3 an elevation of the machine 50 viewed from the side opposite Fig. 1.

ln the drawings the container or tub is indicated et l and :is shown has a partition or rib 2 dividing it intocommunicating c linclrical chambers 3 and 4, respectively, 1n 55 each of which an agitator 5. These may bv of any suitable form, preferably hollow as shown` and lengthwise curved or sh:l ped in any of the livzxys disclosed in the patents of the nior art, such.. for 'in-stance, 'as 60 :Mosher ifo. 1.371.046, fial'ch 8th, 1921. The tub 1 is pre fcrnhllv, but not necessarily` also hollowerl out or juolietcd as indicated at 6 for circulation therethrough of a heating or foolingr medium, such as water or steam. 65 The temperature of the hollow agitators 5 may be lilnfwiss governed.

The container l. is tiitelilifY supported on the driving: shaft 7 of one of the a itators 5, this shaft hcingf journnled in relzatively heavy side frunms H and on its opposite ends being provided with u bull-gear' 9 and a pinion 1f)7 the former adapted to he driven in any suitablel manner as hy a pinion l1 from u suitable source of power such as a. 76 line shaft or motor, and the letter. lthrough the gear 12, driving the slnif" T on which the second of the two agitutors 5 is mounted. 0n each side of the container l, and disposed vertically,y are formed Inutile ted gears 13 which mesh with racks 14 mounted in guides 15 and loosely pinned as indicated at 16 to the plunger 1T of e horizontally arranged fluid pressure cylinder lS that is suitably fixed to the frame of the machine. By operation ot' the plunger 1'?j the containerll muy bc swung trom the position shown in Fig. l to the tilted discharging position shown in Fin. Il lieti-minced by stops 18 and citlu'uit lntcrruvtion of the drive 90 of thc Agitatori;

The container l is clvrsedby 4:1. combined cover and hopper. the fornr poi" 'on being indicated by the mur-crei El? and de.: latter portion being indicated by the numeral 20, Fig. l. The combined cover and" hopper lil-20 is pivoted :is indicated et 9.1 to the free ends spaced arms which together y hopper 19-20, suitable play constitute ya lifting lever that is fulcrumed at 23 tio plates or brackets 24 integral (or otherwise made rigid) With the end walls of the -container l. Between the plates or brackets 24, a second Huid pressure cylinder 25 is suitably fixed for operation of a plunger 26 that is yieldably connected, by coiled s rings 27 and a sleeve 28 slidable on the p unger rod, to trunnion pins 29 that are loosely received by the lever arms 22. As will be obvious, operation of the plunger 2.6 will move the lever arms 22 about the fulcrum 23 and lift the combined cover and ho per 19-20 away from the container l.

o impart, in addition to the above mentioned lifting.movement, a turning movement to the combined cover and hopper 19-2O 'about the pin 21 as a center, links 30 are hinged thereto as indicated at 3l, these links being also loosely pinned as indicated at 32 to upstanding bracket pieces 33, which latter are integral with the lates or brackets 24 and therefore also xed relative to the container 1. 'Consequently, lifting the lever 22 not only lifts the combined cover and hopper 19'20 but also turns the latter as indicated in dotted lines in Fi'. 1.

Preferably, but not necessarily, te hopper portion 20 closed by a shutter 34 hinged to a hand-lever 35 that is-fulcrumed as indicated at 36 tothe combined cover and or enlargement being provided at the openlng 37 where the shutter asses through a wall of the hopper` to permit the incidental free movement that is necessary.

In operation, the agitators a) are continuously driven.- Supposing container 1 to be empty, material is charged into the ho per portionV 20 and the shutter 34 retracte by suitable movement of the hand-lever 35. The rubber, sulphur and other ingredients that havebeen'previously gathered in the desired roportions are then introduced and fall witliin the range of action of the agitators 5'by which'they are vigorously worked and blended into a homogeneous mass. Without stopping the agitators, and at the completion of the' mix, the container l is swung to the` tilted position shown in Fig. 3, this being done by suitable operation of the -cylinder 18'. Then the combined cover and hopper 19-20 is swung to a clear or nonobstructin position and the mixedl batch discharl Preferably, the batch is discharge into a bucket 38 that rests on a conveyor or gravity run-way 39 having rollers 40. The container or tub 1 is then restored to its normal horizontal position ready for recharging andA another cycle of operations.

From the foregoing description it will be seen that I have provided a simple, compact and readily operable device for mixing up batches of rubber composition. Its overall tailler. agitating meansrevolvable amount of head-room is required above the machine as heretofore seems to have been the case` The yieldi driving connection 27- 28 between the cylinder 25 and the lever 22 permits the necessary power operation of the combined cover and hopper and also insures against breakage in case of jam from charging of the container beyond its capacity.

Having thus described my invention what I claim and desire to protect by Letters Patent is l. A mixing machine including in conibination, a container, agitating means within the container, means for actuating the agi tating means, a combined cover and hopper for completely confining material inthe container, means for tilting the container to discharge its contents, and means includin a lever movable about a fulcrum fixed relative to the container for removing the combined cover and hopper from a position obstructing discharge of the contents of the container.

2. In a mixing machine, a container, agitating means Within the container, in cornbination with a combined cover and ho per for completely closin the container, a ever fnlcrumed at "one si e of the container and articulated to said combined cover and hopper, and means for operatin said lever to lift the combined cover an hopper and open the container.

3. In a mixing machine, tating means within the container, in combination with a combined cover and ho per for completely closing the container, a ever loosely pinned to the latter and fulcrumed at one side of the container, a link looselyconnected at one end to the combined cover a container, agi-` ins and hopper and at its other end hin ed in spaced relation from the fulcrum o lever and means for operating said, lever to lift and turn the combined cover and hopper` 4, In a mixing machine, a tiltabl conithin the container, a combined cover and hopper for wmpletely closing the container, articulated supporting and actuating connections for said combined cover and hopper, and separate fluid pressure devices for movin said connections and thereby the combinecgl cover and hopper and for tilting the contalner.

said i 5. 1n a mixing maffhile, n :foniuimn :rgb -frnm nl" said lever, means for operating' Said tilting menus within the rontnneh in mmlm'm' tu lift and turn the Combined Cover 10 binaton with n wmhum www' um? immun :and humm'. and a yielding uftuatiug 90H-- fm' complvlely rinsing; (he wmuimr. :a bevor mwfm between will fm1-i' :md its operating 5 fulvlummf at mw sidi; of Hw mumirwi. a rwsmH.

link oosuy mmwvc at um @mi n du; fignm at Detmii Midlgzm th 14th day Combined vover and homwr und at im tinnf May 1921. endllingd in spaced rflalinn fvwm m ful RY H. GERARD. 

